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Apodiformes
Traditionally the bird order Apodiformes contained three families: the swifts, Apodidae, the tree swifts Hemiprocnidae, and the hummingbirds Trochilidae. In the Sibley-Ahlquist taxonomy, hummingbirds are separated from the Apodiformes as a new order Trochiliformes. 
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Apodiformes".